We got an even better look at Blue’s tux when she popped over to join host James Corden, Jennifer Lopez, John Legend, Faith Hill, Tim McGraw and Neil Diamond himself during some impromptu Cardboard Karaoke of “Sweet Caroline” during the show.

Pretty freakin’ adorable, if we do say so ourselves.

Didn’t Blue steal the show sitting on Jay Z’s lap? Tweet us @BritandCo!